The recommended YouTube thumbnail size is 1280 x 720 pixels and up to 2MB. For best results, upload a video thumbnail with a 16:9 aspect ratio. JPG, GIF, and PNG image files are supported. The minimum size dimensions for YouTube thumbnail images is 640 pixels wide.
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Answer; Thumbnail
Poison Dart Frogs are about the size of your thumbnail
a mechanical illustration is a SMALL sketch, like the size of a thumbnail. Leonardo daVinci used these
A small version of a large graphic on a web page is often called a thumbnail. Many designers use them to put more on a single page and make it easier to browse.
on of thumbnail in MS word
Thumbnail crab was created in 1793.
Thumbnail
It may be, depending on the software being used to view the thumbnail. A thumbnail in and of itself is not clickable, as it is merely a collection of bytes that form an image on the screen. However, the picture of the thumbnail may be clickable depending on the software used to view the thumbnail.
thumbnail
The name of a small picture is a THUMBNAIL